commit 7b70d2c90dd4cab9189942e26445203257c80fe7
Author:     Albrecht Schlosser <albrechts.fltk@online.de>
AuthorDate: Thu Apr 22 12:34:20 2021 +0200
Commit:     Albrecht Schlosser <albrechts.fltk@online.de>
CommitDate: Thu Apr 22 12:34:49 2021 +0200

    Fix handle_events demo build w/o OpenGL
    
    test/handle_events.cxx can optionally be built with an Fl_Gl_Window,
      but this doesn't work if OpenGL support (libfltk_gl) is disabled.

 test/CMakeLists.txt | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git test/CMakeLists.txt test/CMakeLists.txt
index 5128e08..7341de8 100644
--- test/CMakeLists.txt
+++ test/CMakeLists.txt
@@ -77,7 +77,11 @@ CREATE_EXAMPLE (file_chooser file_chooser.cxx "fltk_images;fltk")
 CREATE_EXAMPLE (fltk-versions fltk-versions.cxx fltk)
 CREATE_EXAMPLE (fonts fonts.cxx fltk)
 CREATE_EXAMPLE (forms forms.cxx "fltk_forms;fltk")
-CREATE_EXAMPLE (handle_events handle_events.cxx "fltk_gl;fltk") # opt. Fl_Gl_Window
+if (OPENGL_FOUND)
+  CREATE_EXAMPLE (handle_events handle_events.cxx "fltk_gl;fltk") # opt. Fl_Gl_Window
+else()
+  CREATE_EXAMPLE (handle_events handle_events.cxx fltk) # w/o Fl_Gl_Window
+endif()
 CREATE_EXAMPLE (hello hello.cxx fltk)
 CREATE_EXAMPLE (help_dialog help_dialog.cxx "fltk_images;fltk")
 CREATE_EXAMPLE (icon icon.cxx fltk)